Title: Shape recovery in a thermoset shape memory polymer and its fabric-reinforced composites
Authors: Ivens, Jan ×
Urbanus, Mathieu
De Smet, Carl #
Issue Date: Mar-2011
Publisher: Budapesti Muszaki es Gazdasagtudomanui Egyetem
Series Title: Express Polymer Letters vol:5 issue:3 pages:254-261
Abstract: A shape memory polymer (SMP) can be deformed from a permanent to a temporary shape above their transformation
temperature. Upon reheating, the SMP spontaneously returns to the permanent shape. SMP’s show high deformability,
but the recovery stresses are very low, thus limiting the size of the components. This paper presents the first results of
an ongoing research to develop large sized components based on SMP. To achieve higher recovery stresses, asymmetric
fibre reinforced shape memory composites were produced (SMPC) using resin transfer moulding. The results show a 30-
fold increase in recovery stress, compared to the neat SMP resin. The recovery stress is independent of the deformation temperature,
but is strongly affected by the degree of deformation. At higher deformation levels, crazing occurs. Even though
the visible effects of the crazing disappear during reheating, it does influence the recovery stress. This indicates that the ability to recover the permanent shape might change in cyclic loading. All composites tested show complete recovery upon reheating. The rate of shape recovery is higher when the fibre reinforcement is loaded in compression.
ISSN: 1788-618X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Department of Materials Engineering - miscellaneous
Structural Composites and Alloys, Integrity and Nondestructive Testing
Technologiecluster Materialentechnologie
Materials Technology TC, Technology Campus De Nayer Sint-Katelijne-Waver
× corresponding author
# (joint) last author

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